I need to add JDK's tools.jar as a project dependency.
Setting it as a normal dependency is not working, because when installing it to the Maven repository, it adds a version number to the jar file. Thereafter, when I need something that needs tools.jar to be in the classpath, it fails.
Using the system scope and setting the path to the jar using < systemPath > should solve the problem. However, although in tests the jar is added to the classpath, at runtime it is not.
Is there a way around this?
Btw, I've added < useManifestOnlyJar >false< /useManifestOnlyJar > to the surefireplugin so that I can see every file in the classpath.
Is Maven running in a JDK?
Find out what version of Java it's running,
mvn -ver
Set your JAVA_HOME env variable to point to a JDK.
if it is not included in your JDK, use system scope, see the FAQ
<profiles>
<profile>
<id>default-tools.jar</id>
<activation>
<property>
<name>java.vendor</name>
<value>Sun Microsystems Inc.</value>
</property>
</activation>
<dependencies>
<dependency>
<groupId>com.sun</groupId>
<artifactId>tools</artifactId>
<version>1.4.2</version>
<scope>system</scope>
<systemPath>${java.home}/../lib/tools.jar</systemPath>
</dependency>
</dependencies>
</profile>
</profiles>
Related
I have a mavenized flex project wich builds fine with adobe sdke 4.6.
Now , i'm trying to compile it with apache recent sdk .
I mavenized the sdk and copied the dependencies in local repo .
the apache version that i mavenized is : 4.13.0.20140701 .
my pom is as below :
<properties>
<flexmojos.version>7.0.1</flexmojos.version>
<flex.version>4.13.0.20140701</flex.version>
<flash.version>11.1</flash.version>
</properties>
<build>
<sourceDirectory>src/main/flex</sourceDirectory>
<plugins>
<plugin>
<groupId>net.flexmojos.oss</groupId>
<artifactId>flexmojos-maven-plugin</artifactId>
<version>${flexmojos.version}</version>
<extensions>true</extensions>
<configuration>
<debug>true</debug>
<sourceFile>ComptaFlex.mxml</sourceFile>
<services>${basedir}/src/main/flex/services/services-config.xml</services>
<compilerWarnings>
<warn-no-constructor>false</warn-no-constructor>
</compilerWarnings>
</configuration>
<dependencies>
<!-- This handles a bug in maven which causes problems with flex resources -->
<dependency>
<groupId>net.flexmojos.oss</groupId>
<artifactId>flexmojos-threadlocaltoolkit-wrapper</artifactId>
<version>${flexmojos.version}</version>
</dependency>
<!-- Without this FM will use the compiler configured in its master
pom, which will result in version conflicts -->
<dependency>
<groupId>org.apache.flex</groupId>
<artifactId>compiler</artifactId>
<version>4.13.0.20140701</version>
<type>pom</type>
</dependency>
</dependencies>
</plugin>
<plugin>
I got maven compile error as :
xmojos.oss:flexmojos-flex-compiler:jar:7.0.1 -> net.flexmojos.oss:flexmojos-generator-internal-compiler-iface:jar:7.0.1 -> org.apache.flex:compiler:pom:4.12.1.20140427: Failed to read artifact descriptor for org.apache.flex:compiler:pom:4.12.1.20140427: Could not transfer artifact org.apache.
it seems that flex mojo always use a default apache version and ignores mine provided . how could i force flexmojo build with my given version .
Flexmojos-maven-plugin version 7.0.x is built using FDK 4.12.1.20140427. This FDK declared as dependency to this maven plugin.
You need firstly mavenize FDK 4.12.1.20140427 and put it to you maven repository. Only after that you can mavenize other versions of FDK.
A dirty work around is to change flexmojo-parent pom file : and edit by hand :
<flex.version>4.13.0.20140701</flex.version>
until flexmojo developpers comes with a better response .
I have written quite a bit of documentation lately, please check-out at: https://cwiki.apache.org/confluence/display/FLEX/Preparing+FDKs+for+Maven+builds
The short version:
We have created a maven extension that should automatically download and install Flex SDKs as they are referenced in the maven build. Also Flexmojos 7.1.0-SNAPSHOT has been updated to no longer contain a reference to any FDK artifact. Also we now use 3-segment versions such as: 4.14.1
This should be pretty simple, but I can't the around to it. I need to create an uberjar using 3rd party jars. I've already followed these instructions: Including a non-Mavenized dependency so it works with maven-shade-plugin and added them to the local repository. But now what? Every Maven tutorial/example is kinda shady (pun intended) and I just don't know how to edit the .pom file properly in order to make it work.
Besides, I'm confused about the shade "plugin" overall. I mean, I followed the basic Maven tutorials and it went all fine and dandy. But when I look into the shade plugin page, I can't find it to download, except for the source code. I mean, isn't it a plugin? Shouldn't I download the binaries and install it into Maven somehow?
Sorry about the extreme noobish question but, needless to say, I know squat about Maven.
To create your shaded (uber) jar, you just need to declare the shade plugin in your pom.xml.
With regards to installation of the shade plugin, simply declaring it in the plugins section of your pom.xml is all you need do. Maven plugins are not installed manually, but are automatically downloaded by Maven (if not already downloaded; just like dependencies), stored in your local repository, and used whenever a project needs them.
As to using it, much like other plugins, declare it in your pom.xml by adding a <plugin> element with your configuration needs. This plugin does nothing automatically (some do, some don't) - you have to specify which "goal" to execute (think "method of a class"), and in which "phase" (think "step" of the build process). Unless you have strange needs, specify the "shade" goal in the "package" phase (see below).
For more configuration possibilities, see the shade usage page, and their examples (especially selecting contents for uber jar). Here is a simple example which, when you run mvn package, replaces your original jar in the target/ directory with the uber jar. It only includes the runtime dependencies, not the ones used at test time (notice the <scope> element of the junit dependency, which is not included in the uber jar).
<project>
<groupId>com.sample</groupId>
<artifactId>test</artifactId>
<version>1.0</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>1.5</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>com.sample</groupId>
<artifactId>test-core</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
If you have already downloaded the binaries and installed them into your local Maven repository all that remains is to declare them as dependencies in the POM. If the shade plugin is also declared in the POM a simple "mvn install" should generate a standalone JAR in the target directory.
I created this profile for deploying artifacts on the server via SCP. I know Ant's scp task is optional, therefore I've added the dependencies.
<profiles>
<profile>
<id>remote-deploy</id>
<build>
<plugins>
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<id>scp</id>
<phase>install</phase>
<configuration>
<tasks>
<scp .../>
<sshexec .../>
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.apache.ant</groupId>
<artifactId>ant-jsch</artifactId>
<version>1.7.1</version>
</dependency>
<dependency>
<groupId>com.jcraft</groupId>
<artifactId>jsch</artifactId>
<version>0.1.42</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</profile>
</profiles>
However, when I run the profile, I end up with
An Ant BuildException has occured:
Problem: failed to create task or type
scp Cause: the class
org.apache.tools.ant.taskdefs.optional.ssh.Scp
was not found.
This looks like one of Ant's optional components. Action: Check
that the appropriate optional JAR
exists in
-ANT_HOME\lib
-the IDE Ant configuration dialogs
Do not panic, this is a common
problem. The commonest cause is a
missing JAR.
This is not a bug; it is a
configuration problem
Is it possible maven wasn't able to download those dependencies or it just ignores them?
The problem was Maven (2.2.1) didn't download the dependencies. I've found out after I upgraded Maven to version 3. For some reason,the new version downloaded the plugin dependencies and it miraculously started to work.
I have a suspicion the problem was in old version Maven's settings - pluginRepository wasn't configured.
It is likely that maven has downloaded the jars but it is not in ant's classpath. If the objective is to deploy the artifacts using maven, you should probably use Maven Deploy Plugin. What you are doing seems to be a roundabout way.
There is a maven-antrun-plugin bug entry, that could explain why this is happening in Maven-2, they also describe workarounds
In multi-module builds, if there are multiple poms configuring the maven-antrun-plugin, the first(?) seems to win, so that the ones later in the build chain reuse the antrun config from earlier poms, thus missing out on stuff that is different ...
In my problem case, I opted to use Maven-3, where the issue seems to be fixed, instead of workarounds with Maven-2. This had the additional advantage of the build to also speed up - now taking 6min instead of the 10min before.
However, if Maven-3 is not possible for you, I'd try the workarounds...
Suppose I have a module A:jar, whose runtime and compilation set of dependencies depends on the JDK version. In my example, I have a pre-jdk6-profile for JAXB API: prior to JDK 1.6.0 I need to include jaxb-api-nnn.jar as a compile dependency. This profile is placed to A.pom.
I also have module B:war, which depends on A:jar. I want to be able to activate this profile on a build server to build the JDK 1.5.x deliverable. When I execute Maven with a given profile activated, I get the message:
mvn -Ppre-jdk6-profile -o install
[WARNING]
Profile with id: 'pre-jdk6-profile' has not been activated.
and jaxb-api-nnn.jar is missing in resulting B.war. However if I activate this profile when building from the parent pom.xml, everything is OK. That means the profiles are not inherited from dependencies, and the parent multi-module pom.xml was able to build everything correctly because it seems like all profiles are merged in reactor.
Shifting the profile to parent pom makes things worse, as the dependencies are applied to all other projects (e.g. to C:ear). Are there nice solutions for this task, namely, if any module A depends on module B, then all compile and runtime dependencies which are activated by a profile, are correctly handled?
The profile in project A:jar follows:
<project ...>
<artifactId>A</artifactId>
<packaging>jar</packaging>
...
<parent>
<artifactId>P</artifactId>
...
</parent>
<profiles>
<profile>
<id>pre-jdk6-profile</id>
<activation>
<jdk>(,1.6.0)</jdk>
</activation>
<dependencies>
<dependency>
<groupId>javax.xml.ws</groupId>
<artifactId>jaxws-api</artifactId>
</dependency>
</dependencies>
</profile>
</profiles>
...
</project>
a) In a multi-module build, you should always build from the top pom, never from an individual module. If you want to build only one module, use advanced reactor options (see mvn --help) like this:
mvn -pl mymodule
b) Define and activate the profile in the parent pom, but add the configuration in the child pom.
parent pom.xml
<profiles>
<profile>
<id>pre-jdk-6</id>
<activation>
<jdk>(,1.6.0)</jdk>
</activation>
</profile>
</profiles>
child pom.xml
<profiles>
<profile>
<id>pre-jdk-6</id>
<dependencies>
<dependency>
<groupId>javax.xml.ws</groupId>
<artifactId>jaxws-api</artifactId>
</dependency>
</dependencies>
</profile>
</profiles>
Several notes way after the fact:
When you use -P profName, it activates a profile named 'profName'
After that, it disables all profiles that have an <activation> tag for them. It doesn't matter whether they are activated by the java version, as in the example, or by default or env value or anything.
That means the -P causes any otherwise activated profile to become deactivated.
Solution: Either use <activation><jdk>...</jdk></activation> or use -P but do not use both.
I have a maven module which has some dependencies. In a certain profile, I want to exclude some of those dependencies (to be exact, all dependencies with a certain group id). They however need to be present in all other profiles. Is there a way to specify exclusions from the dependencies for a profile?
To my knowledge, no, you can't deactivate dependencies (you can exclude transitive dependencies but this is not what you are asking for) and yes, what you are currently doing with the POM (manually editing it) is wrong.
So, instead of removing dependencies, you should put them in a profile and either:
Option #1: use the profile when required or
Option #2: mark the profile as activated by default or put it in the list of active profiles and deactivate it when required.
A third option would be (not profile based):
Option #3: separate things in two separated modules (as you have separated concerns) and use inheritance.
Instead of excluding dependencies in a profile, you can set them as provided in it. This doesn't require any overly complex configuration and will exclude the dependencies you don't want from the final build.
In the desired profile, add a dependencies section, copy the declaration of the ones you want to exclude and scope them as provided.
For example, let say you want to exclude slf4j-log4j12:
<profiles>
<!-- Other profiles -->
<profile>
<id>no-slf4j-log4j12</id>
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.2</version>
<scope>provided</scope>
</dependency>
</dependencies>
</profile>
<!-- Other profiles -->
</profiles>
One way that occurs to me is to have the dependencies in a separate pom. You can then add an <exclusions> section via the profile.
<dependencies>
<dependency>
<groupId>my.company.dependencies</groupId>
<artifactId>my-dependencies</artifactId>
<version>1.0.0-SNAPSHOT</version>
<type>pom</type>
</dependency>
</dependencies>
<profile>
<activation>
<activeByDefault>false</activeByDefault>
<property>
<name>exclude-deps</name>
</property>
</activation>
<dependencies>
<dependency>
<groupId>my.company.dependencies</groupId>
<artifactId>my-dependencies</artifactId>
<version>1.0.0-SNAPSHOT</version>
<type>pom</type>
<exclusions>
<exclusion>
<groupId>my.company</groupId>
<artifactId>bad-dep-1</artifactId>
</exclusion>
<exclusion>
<groupId>my.company</groupId>
<artifactId>bad-dep-2</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
</profile>
I don't think it is possible to exclude direct dependencies either (at least, nothing is mentioned here).
The best thing you can do is to enclose the desired dependencies for each case into different profiles (as suggested already), but, you'll need to create two "mutually exclusive" profiles with the one of them "active by default". The most reliable way to achieve this is by using a parameter for your profile activation e.g.
<profiles>
<profile>
<id>default-profile</id>
<activation>
<property><name>!exclude</name></property>
</activation>
<dependencies>
dependency-A
dependency-B
...
</dependencies>
</profile>
<profile>
<id>exclude-profile</id>
<activation>
<property><name>exclude</name></property>
</activation>
<!-- exclude/replace dependencies here -->
</profile>
</profiles>
Then using "mvn [goal]" will use profile "default-profile", but "mvn [goal] -Dexclude" will use profile "exclude-profile".
Note that using 'activeByDefault' instead of a parameter for your "default" profile might work in some cases but it also might lead to unexpected behavior. The problem is that 'activeByDefault' makes a profile active as long as there is no other active profile in any other module of a multi-module build.
maven is a tool, we can hack it.
maven runs fine if you have the same artifact + version defined as dependency twice.
define a profile that eliminates an artifact + version by changing it to another package we already have.
For example, in the pom.xml:
... other pom stuff ...
<properties>
<artifact1>artifact1</artifact1>
<artifact2>artifact2</artifact2>
<artifact1.version>0.4</artifact1.version>
<artifact2.version>0.5</artifact2.version>
</properties>
<profile>
<id>remove-artifact2</id>
<properties>
<artifact1>artifact1</artifact1>
<artifact2>artifact1</artifact2>
<artifact1.version>0.4</artifact1.version>
<artifact2.version>0.4</artifact2.version>
</properties>
</profile>
Now if you install this pom.xml without the profile, artifact1:0.4 and artifact2:0.5 will be the dependency.
But if you install this pom.xml with the profile mvn -P remove-artifact2
The result pom.xml contains only artifact1:0.4
This comes quite handy during api migration where artifact are renamed and versions are not compatible.
Bit dirty but lightweight solution is to use <scope>import</scope>.
Unlike the other scopes you could use this:
will disable compile-time and runtime dependecies; unlike provided or runtime which disables only one at a time
won't mess up your test scope
you don't need to specify path to some dummy jar as would system scope require
Nothing gets imported as long as you use this hack outside dependencyManagement.